Compilare: main.cpp: In function 'int solve(int, int, int, int)': main.cpp:56:6: warning: unused variable 'cnt' [-Wunused-variable] int cnt=0; ^~~ main.cpp: In function 'unsigned int getint()': main.cpp:15:40: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^ main.cpp:20:40: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^